000 00313 a2200121 4500
080 _a550
_bS 745 I
245 1 _aIntroduction to the structure of the earth
_cby E.W. Spencer
260 _aNew York
_bMcGraw-Hill Book Co.
_c1969
650 _aEarth
100 1 _aSpencer, E.W.
_d
300 _a598 p.
901 _a108954
999 _c31064
_d31064